最重要的是这些实践植根于日常的物质实践中。
Most important is that these practices are embedded in everyday material practices.
由计算机及其网络组成的这个“新”世界，对人类的物质实践和认知思维产生了前所未有的冲击和影响。
This" new" world that consists of computer and network, has produced unprecedented impact and influence to human material practice and cognitive thinking .
作者根据自己多年研制国家标准物质实践和经验，全面地叙述了标准物质研制过程及其关键所在和心得体会。
Based on the practice and experience of the reference material developing for many years, the author elaborates the key factors of reference material developing and some related considerations.
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